I tried to upgrade the BIOS to F.55 which was provided by HP. After successfull installation of new BIOS windows shutdown properly. I start the PC again, HP Logo appears, and then nothing happen. The OS does not load or boot at all.

I also tried to boot using Windows 98 Second Edition CD (to load DOS) but this also did not work.

1. Go to hp site and download the correct version of your BIOS. In my case F.12 was needed.Why not latest version? Because there is no guarantee that latest will work for you, see details after the steps.

2. Go to where you downloaded the file and using 7-Zip (or your tool of choice of course) unzip the contents to a folder of your choice. We'll get to this again later, so keep this folder open.

3. Use 128MB or any USB Thumbdrive/Flashdrive (the smallest you could find, since they said the smaller the better ) and reformatted as FAT or FAT32 by right clicking the drive and clicking "format"

4. Now that my USB thumbdrive is ready, go back to the folder where you extracted the BIOS update file (The folder's still open right?)

5. If you have Integrated Intel Graphics like me, copy the "30F7F12U.FD" to the USB drive and RENAME the file "30F7F12U.FD" to "30F7.BIN". Remember that this name is for the system "DV4-1125nr". If you have a different motherboard, system or BIOS, then the name should be according to that.

The next steps are 0.0's exact steps (the link of full detail discussion is provided below), which I've merely numbered:

6. Disconnect the AC adapter from the notebook.

7. Remove the battery from the notebook.

8. Inserted the USB thumb drive into one of the USB ports on the notebook.Didn't seem to matter which one.

9. Hold down the 'Windows' Key and the 'B' key.

10. Connected the AC adapter.

11. Pressed the 'Power' button on the notebook.

12. When the LEDs came on, let go of power button and the two keys held down earlier.

13. After about 10 seconds the notebook started reading the USB thumb drive. While searching for the file the notebook beeped once a second.The number of beeps varied, depending on how big the thumb drive was andthe number of files on the thumb drive, from just one beep to many.If the file was not found, the notebook would reset itself and try again.

14. If the file was found then it took about 12 seconds for the notebook to load it. No beeping sounds heard during the loading time.

15. When loaded the notebook started flashing, indicated by beeps every 2 seconds. This took about 32 seconds.

16. About 5 seconds after the beeping had stopped the notebook shutdown.

First I update my pc with the Latest BIOS (F.66), but did not work for me (OS did not loaded after HP Logo ). So I decided to roll back to old F.12 (the version that was shipped when laptop was purchased) according to the procedure described above. But the problem was where to find F.12 version as HP at the moment gives links only for BIOS version F.66 to F.55 (in drivers section of hp support site)

Luckily I found a direct link to that F.12 version in the following thread.

1. Go to hp site and download the correct version of your BIOS. In my case F.12 was needed.Why not latest version? Because there is no guarantee that latest will work for you, see details after the steps.

2. Go to where you downloaded the file and using 7-Zip (or your tool of choice of course) unzip the contents to a folder of your choice. We'll get to this again later, so keep this folder open.

3. Use 128MB or any USB Thumbdrive/Flashdrive (the smallest you could find, since they said the smaller the better ) and reformatted as FAT or FAT32 by right clicking the drive and clicking "format"

4. Now that my USB thumbdrive is ready, go back to the folder where you extracted the BIOS update file (The folder's still open right?)

5. If you have Integrated Intel Graphics like me, copy the "30F7F12U.FD" to the USB drive and RENAME the file "30F7F12U.FD" to "30F7.BIN". Remember that this name is for the system "DV4-1125nr". If you have a different motherboard, system or BIOS, then the name should be according to that.

The next steps are 0.0's exact steps (the link of full detail discussion is provided below), which I've merely numbered:

6. Disconnect the AC adapter from the notebook.

7. Remove the battery from the notebook.

8. Inserted the USB thumb drive into one of the USB ports on the notebook.Didn't seem to matter which one.

9. Hold down the 'Windows' Key and the 'B' key.

10. Connected the AC adapter.

11. Pressed the 'Power' button on the notebook.

12. When the LEDs came on, let go of power button and the two keys held down earlier.

13. After about 10 seconds the notebook started reading the USB thumb drive. While searching for the file the notebook beeped once a second.The number of beeps varied, depending on how big the thumb drive was andthe number of files on the thumb drive, from just one beep to many.If the file was not found, the notebook would reset itself and try again.

14. If the file was found then it took about 12 seconds for the notebook to load it. No beeping sounds heard during the loading time.

15. When loaded the notebook started flashing, indicated by beeps every 2 seconds. This took about 32 seconds.

16. About 5 seconds after the beeping had stopped the notebook shutdown.

First I update my pc with the Latest BIOS (F.66), but did not work for me (OS did not loaded after HP Logo ). So I decided to roll back to old F.12 (the version that was shipped when laptop was purchased) according to the procedure described above. But the problem was where to find F.12 version as HP at the moment gives links only for BIOS version F.66 to F.55 (in drivers section of hp support site)

Luckily I found a direct link to that F.12 version in the following thread.

Re: HP Pavilion DV4-1125nr Unable to boot after BIOS upgrade from version F.12 to F.55

Re: HP Pavilion DV4-1125nr Unable to boot after BIOS upgrade from version F.12 to F.55

System: HP Pavilion DV4-1125nr Notebook PC

Product#: FR922UAR#AB

System Board Id: 30F7

BIOS Version (before update): F.12

OS: Windows 7

Request:

I tried to upgrade the BIOS which was provided by HP. After successfull installation of new BIOS windows shutdown properly. I start the PC again, HP Logo appears, and then nothing happen. The OS does not load or boot at all.

Kindly ,may I Know If The procedure explained in above refered article would work in the case of HP Pavilion DV4-1125nr ,having Intel Core2,Duo. Idonot know updated Bios version or the earlier version.

Re: HP Pavilion DV4-1125nr Unable to boot after BIOS upgrade from version F.12 to F.55

It seems to me that you have the same problem as I had in the past. But you have to make sure that what's the suitable version of BIOS for your notebook. If you are not sure you can try from F.05 to F.12 versions. BIOS name also depends on the Graphics Card. I described my experience and correct version of BIOS (F.12) in the solution. You can try but make sure during this operation you are connected to electricity, as you may have read in the stpes that you need to take out the battery for this kind of BIOS upgrade experiment.